The 41,167 blockages were caused by Londoners putting "unflushable" items like cooking oil or wet wipes down the drain and marked an almost 4% increase compared to the previous year.

The company's sewer flushers even took part in a special "3D fatberg experience" today at South Bank to implore passers-by to help reduce blockages.

Fatbergs, which can flood homes, are defined as "large masses of solid waste in a sewerage system, consisting especially of congealed fat and personal hygiene products that have been flushed down toilets".

One of London's fatbergs blocking a sewer

We can now reveal London's top "fatberg hotspots", four of which are in west London, that experienced the greatest number of blockages in the last 12 months.

10. Barking and Dagenham

This outer east London borough was just shy of 2,000 blockages in the past twelve months.

With 1,925 in one year, the area experienced a nearly 7% increase since the previous period.

Thames Water revealed that it currently spends £18 million on clearing blockages to keep the London sewers running.

9. Newham

Newham is home to London stadium and thousands of blocked drains (Image: Getty Images)

This Essex borough, named because it merged West Ham and East Ham, had 1,978 blockages.

This marked an even bigger jump from the last year that Barking and Dagenham, with a 12% increase in the number of blockages.

Thames Water says it is committed to reducing blockages by 10,000 across the region before 2025 as part of its £11.7 billion business plan.

Thames Water’s Henry Badman advised members of the public to store cooking oils in a container such a jar to cool and then putting it in the bin, rather than pouring it down the drain and risking a blockage.

3. Hillingdon

This is a whopping 15% increase from the previous year and means the borough is well on its way to an average of seven blockages every day.

Mr Badman added that: “It may seem easier to pour oil down the sink or flush wet wipes away thinking the problem has gone, but someone has to deal with it – and it could be you if the blockage occurs on your property."

2. Bexley

Bexley, a south east London borough that borders Bromley, is the capital's second largest "fatberg" hotspot, with 2,430 blockages recorded.